"Public officials in Ohio are required to file annual disclosure statements with the Ohio Ethics Commission identifying areas that could be potential conflicts of interests for them, for example, sources of income, names of family members, the identification of sources of gifts that they receive over $75, investments, creditors, debtors, things of nature."

Mayfield Heights Law Director Leonard Carr said the investigation was tied to the signing bonus from a drilling deal with Seagull Development, which does business with the city.

Another issue was a reported $100,000 deal with a real-estate developer.

Carr said the deals themselves were not the problem, just what Costabile did or did not report on his ethics disclosure form.

Costabile served as mayor and safety director for seven years, and will be replaced by Council President Anthony DiCicco.